Aurora State Airport, Aurora, OR (UAO)
Correctly identified first by Dave Brown.

Located in Oregon's Willamette Valley just south of the Portland metro area, Aurora State is a happening little airport. Home to Vans Aircraft (who are now getting more new airplanes into the air than Cessna, Piper or anybody else) and a busy avionics shop (Pacific Coast Avionics), it's a GA-friendly place with lots going on.